Most individual suspension fixes or part replacements should take less than a day to complete. Parts like tires and wheels, shocks, struts, and springs should only take a couple of hours to change out. Swapping out steering systems, bushings, bearings, and joints can be more time consuming, but all of these can be done in less than a day. If you are having multiple parts replaced, you very well might be looking at a couple of days as they cannot all be worked on simultaneously. All of this depends on the availability of parts, the shop’s schedule, and the mechanic’s skill.